72 return true;
73 }
74
75 return ShenandoahHeuristics::should_start_gc();
76 }
77
78 void ShenandoahCompactHeuristics::choose_collection_set_from_regiondata(ShenandoahCollectionSet* cset,
79 RegionData* data, size_t size,
80 size_t actual_free) {
81 // Do not select too large CSet that would overflow the available free space
82 size_t max_cset = actual_free * 3 / 4;
83
84 log_info(gc, ergo)("CSet Selection. Actual Free: " SIZE_FORMAT "%s, Max CSet: " SIZE_FORMAT "%s",
85 byte_size_in_proper_unit(actual_free), proper_unit_for_byte_size(actual_free),
86 byte_size_in_proper_unit(max_cset), proper_unit_for_byte_size(max_cset));
87
88 size_t threshold = ShenandoahHeapRegion::region_size_bytes() * ShenandoahGarbageThreshold / 100;
89
90 size_t live_cset = 0;
91 for (size_t idx = 0; idx < size; idx++) {
92 ShenandoahHeapRegion* r = data[idx]._region;
93 size_t new_cset = live_cset + r->get_live_data_bytes();
94 if (new_cset < max_cset && r->garbage() > threshold) {
95 live_cset = new_cset;
96 cset->add_region(r);
97 }
98 }
99 }
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72 return true;
73 }
74
75 return ShenandoahHeuristics::should_start_gc();
76 }
77
78 void ShenandoahCompactHeuristics::choose_collection_set_from_regiondata(ShenandoahCollectionSet* cset,
79 RegionData* data, size_t size,
80 size_t actual_free) {
81 // Do not select too large CSet that would overflow the available free space
82 size_t max_cset = actual_free * 3 / 4;
83
84 log_info(gc, ergo)("CSet Selection. Actual Free: " SIZE_FORMAT "%s, Max CSet: " SIZE_FORMAT "%s",
85 byte_size_in_proper_unit(actual_free), proper_unit_for_byte_size(actual_free),
86 byte_size_in_proper_unit(max_cset), proper_unit_for_byte_size(max_cset));
87
88 size_t threshold = ShenandoahHeapRegion::region_size_bytes() * ShenandoahGarbageThreshold / 100;
89
90 size_t live_cset = 0;
91 for (size_t idx = 0; idx < size; idx++) {
92 ShenandoahHeapRegion* r = data[idx].get_region();
93 size_t new_cset = live_cset + r->get_live_data_bytes();
94 if (new_cset < max_cset && r->garbage() > threshold) {
95 live_cset = new_cset;
96 cset->add_region(r);
97 }
98 }
99 }
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